EMC E20-555 Online Practice Questions and Exam Preparation

EMC E20-555 Online Questions & Answers

• Question 71:

  Which protocols are supported by Isilon OneFS for file access?

  A. NFS, HDFS, HTTP, SMB
  B. SMB, HTTP, SMTP, HDFS
  C. HDFS, NFS, iSCSI, SNMP
  D. FTP, NFS, SMB, FC
  A. NFS, HDFS, HTTP, SMB

• Question 72:

  A customer plans to migrate data to a remote Isilon cluster. What is a consideration when configuring a cluster with SyncIQ and hard SmartQuotas?

  A. SyncIQ ignores quota limits during replication but if a quota is over limit, quotas will still allow users to add data to the directory.
  B. Quotas should be configured on both SyncIQ source and target directories prior to a migration.
  C. SyncIQ will replicate source quota configurations to the target.
  D. Quotas should be set only on source directories and never on target directories for migrations.
  A. SyncIQ ignores quota limits during replication but if a quota is over limit, quotas will still allow users to add data to the directory.

• Question 73:

  A customer wants to add Unix users to their cluster, and requires that NFS access be fault-tolerant. What would you recommend?

  A. Use NFS v4 and dynamic IP addressing with SmartConnect Basic
  B. Use NFS v4 and dynamic IP addressing with SmartConnect Advanced
  C. Use NFS v3 and dynamic IP addressing with SmartConnect Advanced
  D. Use NFS v3 and dynamic IP addressing with SmartConnect Basic
  B. Use NFS v4 and dynamic IP addressing with SmartConnect Advanced

• Question 74:

  Refer to the exhibit.

  

  Your customer has three different clusters. File systems on two of the clusters are at 90% full, and the largest cluster is 10% full. Active data resides on the largest cluster. The customer has five different node types totaling 2PB and 54 nodes. Nodes from left to right are as shown: 1.X200 2.12000X 3.36000X 4.NL108 5.108NL

  They have a Smartpool license and believe that tiering data would help free up needed space.

  After talking with the customer and explaining the use of SmartPools, how would you recommend optimizing utilization across all of the nodes that the customer owns?

  A. Attach all nodes to a common Infiniband switch.
  B. Go to GUI and put alike nodes in the same pools. Then name them.
  C. Borrow nodes to reconfigure the cluster and migrate the data to new cluster.
  D. Explain to the customer that this will result in data loss.
  A. Attach all nodes to a common Infiniband switch.

• Question 75:

  How are clients, L1 cache, L2 cache, and disks interconnected?

  A. Clients connect to L1 Cache and write coalescer L1 cache is connected to L2 on the local node L2 cache connects to disks on all nodes via internal network
  B. Clients connect to L2 Cache and write coalescer L1 cache connects to disks on all nodes via internal network L2 cache is connected to L1 on the local node
  C. Clients connect to L2 Cache and write coalescer L1 cache connects to disk on its local node L2 cache is connected to L1 on all nodes via internal network
  D. Clients connect to L1 Cache and write coalescer L1 cache is connected to L2 on all nodes via internal network L2 cache connects to disks on its local node
  A. Clients connect to L1 Cache and write coalescer L1 cache is connected to L2 on the local node L2 cache connects to disks on all nodes via internal network

• Question 76:

  A cost-conscious customer is exploring Isilon for their PACS archive. The workflow consists of one hundred cases a day, each including fifty 60MB image files. However, each image will have five-hundred 64kB metadata files associated with it. They currently have six years worth of archived data. They will need to migrate to the new solution and they need to plan for an additional three years of archive capacity.

  Which solution would you recommend to fit their capacity needs?

  A. 24 NL-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
  B. 18 NL-Series nodes with N+2:1 protection policy providing 2078 TiB of useable capacity
  C. 24 X-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
  D. 12 NL-Series nodes with N+2 protection policy providing 1300 TiB of useable capacity
  A. 24 NL-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity

• Question 77:

  What key considerations should be kept in mind when designing a 300TB solution?

  A. Workflow management Defining class of service Time of day services RPO and RTO Data retention and backup
  B. Defining class of service Time of day services ROI and TCO Data retention and backup
  C. SmartPools Smartconnect Snapshots Space for snapshots
  D. Always include 2% SSD SmartPools Smartconnect Snapshots InsightIQ
  A. Workflow management Defining class of service Time of day services RPO and RTO Data retention and backup

• Question 78:

  You need to gather information in order to design an Isilon solution. What are included in the Top 10 qualification questions?

  A. Required capacity, average file size, growth rate, and network supplier
  B. Current infrastructure, desired protocols, CapEx/OpEx preference, and growth rate
  C. Required capacity, applications in use, desired protocols, and growth rate
  D. Current infrastructure, applications in use, desired protocols, and company turnover
  A. Required capacity, average file size, growth rate, and network supplier

• Question 79:

  A potential customer requires 800 TB of usable capacity to store medical images for their network of health clinics. The IT department has limited staff and currently manages four storage arrays from other vendors. During a meeting with the Director of IT you learn that the company is considering a solution from a competitor of EMC using two of the existing arrays and two new arrays.

  Which Isilon capabilities would show a better ROI for the customer?

  A. Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions. With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically 80% or higher. Isilon utilization is typically 80% or higher due to use of a single filesystem and virtual capacity for drive and node failures.
  B. With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically 80% or higher. OneFS compression results in higher effective capacity within the cluster. Traditional clustered filesystems require 4%-10% internal overhead compared to Isilon virtual capacity.
  C. Forward Error Correction overhead is 7% lower than traditional RAID. Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions. According to an IDC study, Isilon improves IT productivity by nearly 50% compared to traditional competitors.
  D. Isilon has 15%-20% less overhead than traditional clustered filesystems. According to an IDC study, Isilon utilization is nearly 50% higher than traditional competitors. Isilon QOS headroom and multiple node pools ensures consistent performance up to 80% utilization.
  A. Isilon has 6%-12% less filesystem overhead than traditional clustered filesystem solutions. With a single filesystem and virtual capacity for drive and node failures, Isilon utilization is typically 80% or higher. Isilon utilization is typically 80% or higher due to use of a single filesystem and virtual capacity for drive and node failures.

• Question 80:

  What is the smallest unit of manageable storage within Isilon SmartPools?

  A. SSD pool
  B. Node pool
  C. Disk pool
  D. File pool
  C. Disk pool